Optimal Control for Correlated Wireless Multiview Video Systems
Emerging multimedia Multiview video systems consist of a dense deployment of multiple partial-overlapped wireless cameras, as well as some access points (Aps) and many wireless distributed relay nodes. Correlated views are captured by cameras followed being transmitted to destination by different Aps and networks links. Packet expiration of one camera flow may harm the whole task. To effectively integrate multiple viewpoints into a whole image, the correlated data rate and deadline of flows from multiple cameras are meaningful. There is a trade-off between data redundancy and time deadline among correlated multi-views subjecting to the constraints of limited buffer length. However, most researches in this field have not considered packet expiration suffering from varieties of delays after multipath. In this paper, we conduct this problem to optimally adjust multiple flows of viewpoints by exploiting spatial and temporal correlations among cameras to reduce delay variances. A global optimization algorithm based on joint rate-distortion and delay-distortion model is proposed. Simulation results show that quality of service for Multiview streaming can be improved by allocating suitable transmission rates among correlated cameras as well as appropriate playout deadline. The PSNR quality shows that better performance can be achieved compared with baseline policies.
KeywordsCorrelation Multiview streaming Packet scheduling Delay
This work was supported by the National Science Foundation of China under Grant (No. 61202470, No. 61471271), Wuhan Science and Technology Project (No.2013010501010148, No. 2014010202010108), Chin Postdoctoral Science Foundation (No. 2013M531711), Financially supported by self-determined research funds of CCNU from the colleges’ basic research and operation of MOE (No.CCNU14A05016, No. CCNU15A02017).
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